Question

8. x CuO + y NH3 - ZCu + N2 + 3H20 what is value of x,y and z in above chemical equation
(a) 2, 2, 3
(b) 3,2,3
(c) 3, 3,2
(d) 2,3,3
9. Which reaction is called skeleton chemical equation
MUMS 11​

Answer 1

Q8.

Answer: (b). 3, 2, 3

This is a balanced chemical reaction of this reaction:

3CuO(s) + 2NH3(g) ------> 3Cu(s) + N2(g) + 3H2O

The balanced chemical equation contains equal amount of elements in the reactant side and in the product side.

In this reaction, the laws of conservation of mass is used.

Q9.

Answer: The unbalanced chemical equation is known as skeletal equation. In this chemical equation, the laws of conservation of mass is not used.

For example:

Mg(s) + O2(g) ------> MgO(s)